Intel 170 Servers manual Workload Configuration, System Configuration, Hardware Configuration

·Inactive switchover - The switching time is measured from the point at which the CHGCRGPRI command is issued from the primary system which has no work until the IASP is available on the new primary system.

·Partition - An active partition is created by starting the database workload on the IASP. Once the workload is stabilized an option 22(force MSD) is issued on the panel. Switching time is measured from the time the MSD is forced on the primary side until new primary node varies on the IASP.

Workload Configuration

The wide variety of hardware configurations and software environments available make it difficult to characterize a ‘typical’ high availability environment. The following section provides a simple description of the high availability test environment used in our lab.

System Configuration

Hardware Configuration

Model	System A		System B
	870		870
Feature code	7421		7421
Interactive Code	7421		7421
Processor	2486		2486
CPW	22000		22000
# of Arms in	50		50
System ASP
Speed of Dasd		15k		15k
Type of IOA's	2757		2757
Size of Dasd		35 Gig		35 Gig
Memory		64Gig		64 Gig
# of Arms		iASP
			180
Speed of Dasd			15k
Type of IOA's		2757
Size of Dasd		35 Gig

Cabling Map

System ASP

System ASP iASP

HSL Line

870 Cluster HSL Cabling Map

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008	Chapter 21 High Availability Performance	327